Ampoule for hypodermic syringes



April 25 1950 vA. E. SMITH 2,505,308

AMPOULE FOR HYPODERMIC SYRINGES Filed June 16, 1947 4, 4 3v INVENTOR.

sa 5,3 Aer/MKZ SM/rf/ Patented Apr. 25, 1950 Bosses UNITED sTATEs PATENT oFElcE Arthur E. Smith, Los Angeles, Calif.

Application VJ une 16, 1947, Serial No. 754,939

2 Claims.

This invention relates to a hypodermic syringe.

The general object of the invention is to provide an improved hypodermic syringe by means of which a fresh solution may be quickly prepared.

A more specific object of the invention is to provide an improved ampule for use in a hypordermic syringe.

Another object of the invention is to lprovide an improved hypodermic syringe barrel for use with disposable ampules.

Another object of the invention is to provide a novel front member for use with a hypodermic syringe.

A further object of the invention is -to provide an improved barrel for a hypodermic syringe.

Other objects and advantages of my .invention will be apparent from the following description taken in connection with the accompanying drawings, wherein Fig. 1 is an extended view showing my improved syringe front member and an ampule used therewith;

Fig. 2- is an enlarged fragmentary central sectional view showing the front member with the ampule partly inserted therein;

Fig. 3 is a view similar to Fig. 2 vwith the ampule fully seated in the front member;

Fig. 4 is a side elevation showing the ampule barrel;

Fig. 5 is an enlarged, fragmentary, sectional view showing the barrel secured to the front member;

Fig. 6 is a view similar to Fig. 5, showing the plunger threaded to the piston cork and in partly advanced position;

Fig. 7 is an enlarged, fragmentary, sectional view showing the inner end of the tube, and

Fig. 8 is an enlarged sectional view showing the front end of the ampule.

Referring to the drawing by reference characters, I have shown my invention as embodied in a syringe, indicated generally at I0. As shown, the syringe includes a front member Il, a barrel I2 and an ampule I3.

As shown, the front member includes a body I4, preferably made of metal, which has a bore I5 and a threaded rear end I6. The forward part of the front member includes a. tapering tip I1 at the inner end of which I arrange a threaded portion I 8. The front member includes a reduced bore I9 in which a tube 20 is secured as by brazng. The tube 20 is pointed at the inner end as at 2l and includes a plurality of holes 22 which afford communication between the interior and exterior of the tube.

Upon the tip I 1, I arrange the hub 23 of a hypodermic needle 24 which has a sharpened front end 25. The hub 23 includes a tapering portion 26 which corresponds to the tapering tip Il and an internally threaded portion 2, the threads of which engage the threads I8 on the front member to produce a fluid-tight joint between the front member and the hub 23. The inner end of the needle 24 is disposed in a recess 2l in the hub which communicates with the tube I9.

The ampule I3 in its rear end includes a piston cork 30 which may be' made of rubber and has a threaded recess 3I adapted to receive a plunger, to be later described. At its forward end the ampule I3 has a stopper which consists of a rubber sleeve 3| which has a peripheral outwardly directed flange 32 thereon which engages the end of a cylindrical member forming a circular wall of the ampule. Arranged within the sleeve 3| is a container member, preferably made of frangible plastic, and consisting of a, tubular body 33, having an integral end disc 34, which is shown as plano-convex, with the convex portion disposed inwardly and with a narrow web 35 connecting the disc to the tubular body 33. A peripheral outwardly directed flange 36 arranged upon the end of the body 33 engages the outer end of the sleeve 3|. A rubber tubular closure 40 is disposed within the tube 33 and has a peripheral flange 4I which engages the flange 36 on the holder. The flange 36 seats in a recess 42 on the iiange 32 and the flange 4I extends out to cover the flange 36 on the member 33.

The closure 4I] has a recess 43 which is closed by a diaphragm 44 and there is a space between the diaphragm and the disc 34 and in this space I arrange a medicinal pellet or tablet 45 which when discharged into the vehicle, such as distilled water, in the body of the ampule, makes a fresh solution for injection purposes.

The barrel consists of a tubular body 50, having viewing apertures 5I and having threads 52 at the forwardV end which' engage the threads I6 to hold the barrel on the front member. The barrel includes a finger gripping member 53 and the rear portion of the barrel includes a closure 54 which has an end portion 55 with a hole 56 therein, through which a plunger 5l reciprocates.

The plunger 51 is arranged within a stepped sliding sleeve 58 which is urged forwardly by a spring 59 and which in its extreme forward position engages a shoulder 60 within the barrel. The sleeve 58 has a bevelled front end 6I which is adapted to engage and center an ampule in the barrel. The rear end of the plunger includes a finger engaging portion 62 and at the forward end the plunger includes a shoulder 63 which is adapted to abut against the piston cork. In advance of the shoulder the plunger includes a threaded portion 64 which is adapted to engage the threads 3l in the piston cork 30.

In use the operator takes the parts shown in Fig. l, e. the front member andthe ampule, and moves the ampule rst to the position shown in Fig. 2 andthengtojthe@position shown in Fig.=3, in whichrlatter positionrthe pointedftip 2 Lon the tube 20 has pierced the diaphragm 44 and has advanced through the tablet 45. The web 35 has been fractured and the disc;.,34fdisp1acedso ,that the tablet 45 is discharged into the vehicle within the ampule. The holes 22 now affordcomgnuni-i,Y

pensates .for yaiiations Z'infdamet'erolnthel cylinf e 1,11 illlgerily ,syringe the ,operator is. assured of having a freshssolutionfoff,thegproper character- .ties-,and `is'assured that,,theesehitene,and .the

A ile- The u seof the plunger-threaded tothe Stopfjner .allows the stopper to;.beipulledr-Slshtlyrear- -Jwardly'l after' the vpre1,irnii'iary,,irlijection .is made so ,that the ,operatorpgiriayatestpto Idetermine gwhether the needle is .,in albloodl vessel, newhich 4 ber sleeve therein, said sleeve having a flange engaging the end of the cylinder, a container member within said sleeve, said container member having a frangible disc at one end thereof and 5 having a peripheral flange at the other end thereof, said peripheral ange engaging said rubber sleeve, a rubber closure within said container member and having a diaphragm spaced siren .saidi f-ranaible dise-said closure :having a lo k,peripheralfrange at thel-outer endf-thereof and engaging the ange on said container member, ldlca tablet between said diaphragm and said disc, andapistoneork in said ampule remote from said sleeve. i5 k212.; An 4a-mpule for use in a syringe, said ampule ,comprising .agylinder having a rubber sleeve thereinat one end, said sleeve having a ange =engaging. the end of the cylinder, a tubular container member within'said sleeve, said container en gmeniber havinga ,-frangiblediscl atgoneendthere- V,effambhaving erlpheral flangeat-,the other :freed-thereof Said:peripheralfflangefengagingthe .,outerrend iofgsaid rubber .-fsleeve, vag-,hollowg vclosure within said container member, said hollowclosure gs-havingyanintegral; diaphragm; said hollow z clo- .l-sui'e, having .a peripheral ,Rangeat the gouter-,end thereof, said hollow closure peripheralflangeenteasing-the iflaneeeonesadfeontainerfmemberiand the fiangeeonsad sleeve, therezbeinelaspaeelbe- 3o tween said diaphragm and saidldisxc, ,ragtabletin -,:.saidf s pace,1;.andiarnieton-eork inaeald anipme. remoteirom saidsleeye Y ARTHUR E.

freegames ei-TED UNITED srAJrEsePAfi-ENTS 

